Well now BKchallenger has just said he had the same problem. So that makes this the 5th time I've heard of this happening. What about the instances it may have happened in where nobody wrote about it on a forum? Here's a thread where 2 people say they've had this problem on another forum:

http://www.challenger talk.com/forums/f5/holy-crap-throttle-stuck-when-driving-7774/

If you're comfortable driving the car knowing that this has been happening to people then that's fine. I live in a very hilly area and wouldn't feel safe thinking my car might speed out of control. Hopefully something will get done about this because I reaaaally want a challenger.